Broker fills: E*Trade vs TradeStation slippage notes

I run the same signals through two accounts; one at E*Trade, one at TradeStation; partly to compare execution. Sharing rough notes after a couple hundred trades on each.

TradeStation: tighter fills on the leveraged ETFs, slightly faster confirmations through the API, and better partial-fill handling. E*Trade: perfectly fine for our timeframe, occasionally a hair more slippage on volatile opens, but the retirement account tooling is excellent.

Bottom line: at daily-bar frequency the difference is small enough that I'd pick based on account features and support, not slippage. Curious if others see the same.