The difference in one sentence
Bybit is depth and a mature derivatives interface. WEEX is more instruments and a thinner book — and therefore more frequent divergence from the market.
The first matters if you trade. The second matters if you hunt routes.
Book depth
This is the only thing that decides whether your order fills at the price you see. On major pairs Bybit’s depth is among the best on the market. WEEX’s book is noticeably thinner, even though it lists more pairs.
In practice: a few thousand dollars fills the same anywhere. Tens of thousands on a secondary pair will move the price further on WEEX, and the "spread" in the table turns out smaller than it looked.
For arbitrage it cuts the other way too: that same thin book is why WEEX prices stray from the market more often, and routes involving it appear more frequently than routes involving Bybit.
Unified account versus separate
Bybit merges spot, futures and options into one account with shared collateral: no moving funds between sections, and a spot holding can back a futures position.
That is also the main risk. With shared collateral, a futures loss eats the collateral your spot coins are part of, so a liquidation can reach what you thought was set aside. WEEX keeps its sections simpler and creates no such overlap.
Fees
Spot is 0.1% at both. The difference is verifiability: WEEX publishes the rate in its instrument directory, per pair, while Bybit keeps its tiers in a separate fee schedule.
P2P
Bybit’s section is larger and more populated. WEEX hides its at /buy-crypto, with few ads per currency and prices that wander much further.
Withdrawal networks
Both publish networks and fees openly. WEEX carries more than a dozen USDT networks, and the gap between dearest and cheapest is over tenfold — the habit of withdrawing over TRON costs the most here.
Who each suits
Bybit if you trade rather than hunt routes: deeper books, a more mature interface, broader P2P. WEEX if you hunt divergence: more instruments, thinner books, more frequent gaps.
