USDT vs USDC: Differences, MiCA and Which Network to Choose
Both stablecoins are worth one dollar, but they are not the same and don't circulate on the same networks. We explain which one to choose and which network to move it on.
Guides
If you are buying or selling crypto P2P with euros, dollars or pesos, you will almost certainly be trading stablecoins: cryptocurrencies that maintain a value of one dollar. The two big ones are USDT and USDC. They are worth the same, but they are not interchangeable everywhere, and in Europe the difference has become important with MiCA. Each one also exists on several networks, and choosing the wrong network is one of the most expensive mistakes in crypto.
USDT and USDC in brief
| USDT (Tether) | USDC (Circle) | |
|---|---|---|
| Issuer | Tether | Circle |
| Main use | P2P markets, Latin America, international payments | Regulated exchanges, DeFi, Europe and the US |
| Status in the EU (MiCA) | Not authorized: licensed providers have delisted it | Authorized |
| Networks on Vailox | Ethereum, Polygon, Arbitrum, BNB Chain and Tron | Ethereum, Polygon, Arbitrum, Base and BNB Chain |
USDT is the stablecoin with the highest volume and the most used in P2P, especially in Latin America. USDC is the preferred choice of regulated exchanges and the only one of the two authorized in the European Union.
What has changed with MiCA
The EU’s MiCA regulation requires stablecoins offered by providers authorized in the EU to meet a set of requirements. USDT does not meet them, so licensed exchanges have removed it for their European customers: OKX in March 2024, Binance in March 2025 and, between 2024 and 2025, others such as Coinbase or Crypto.com.
What MiCA does not do is prohibit a person from holding USDT in their own wallet or sending it. The regulation governs issuers and service providers, not holding.
In practice:
- If you live in the EU and want to avoid doubts, USDC is the stablecoin with the clearest regulatory framework.
- If you trade with Latin America or with counterparties who use Tron, USDT remains the de facto standard.
Which network to choose
The same stablecoin exists on several blockchains, and tokens from one network are not visible on another. If someone sends you USDT over Tron and you expected to receive it on Ethereum, it won’t show up in your wallet until you check the right network. And if the address belonged to an exchange that doesn’t support that network, you may not be able to recover it.
These are the networks available on Vailox and when each one makes sense:
| Network | Stablecoins | Fees | When to use it |
|---|---|---|---|
| Tron | USDT | Low, depending on the account’s energy | If your counterparty or exchange uses USDT on Tron, very common in Latin America |
| Ethereum | USDT and USDC | The highest | Large amounts, or if you plan to use the funds in Ethereum DeFi |
| Arbitrum | USDT and USDC | A few cents | Good all-around option: cheap and compatible with Ethereum |
| Base | USDC | A few cents | If you work with USDC and wallets or apps in the Coinbase ecosystem |
| Polygon | USDT and USDC | A few cents | Small, frequent payments |
| BNB Chain | USDT and USDC | Low | If your funds are already in the BNB ecosystem |
Some useful rules:
- Choose the network where you will use the funds afterward. Moving stablecoins between networks costs time and fees.
- Always keep gas. To move USDT or USDC you need a small amount of the network’s native token: ETH on Ethereum, Arbitrum and Base, POL on Polygon, BNB on BNB Chain, and TRX on Tron. On Vailox you can get it with the Refuel tool, paying with USDT or USDC.
- Check the network before every transfer, especially if you are sending to an exchange.
How this fits into a P2P trade
On a P2P with onchain escrow like Vailox, the network is part of the listing: the seller locks the funds on a specific network, and the contract releases them to your wallet on that same network. That eliminates the typical “it was sent on the wrong network” problem. You only need to check two things when choosing a listing:
- That the network is one your wallet supports.
- That you have gas on that network to move the funds afterward.
If you are going to buy with Bizum, you’ll find the step-by-step guide in how to buy USDT with Bizum.
Frequently asked questions
What is the difference between USDT and USDC?
Both are stablecoins pegged to the dollar. USDT is issued by Tether and is the most widely used in the world, especially in Latin America and on the Tron network. USDC is issued by Circle and is authorized under the EU's MiCA regulation.
Is USDT banned in Spain?
Holding it is not banned. MiCA prevents providers authorized in the EU from offering USDT to their customers because it is not an authorized stablecoin, but it does not prohibit an individual from holding it in their own wallet or sending it.
Which network is cheapest for moving USDT?
Layer 2 networks like Arbitrum or Base, and networks like Polygon or BNB Chain, usually have fees of a few cents. Ethereum is the most expensive. Tron is very popular for USDT, but its fees depend on the account's energy and bandwidth.
What happens if I send USDT on the wrong network?
The funds arrive at the same address on another network. If the address is yours in a wallet that supports that network, you can recover them by switching networks; if it is an exchange or a wallet that doesn't support that network, you may not be able to recover them.
