Ran the cheaper TT levers for years with no mush. Will be how you’re bleeding them , are you bleeding them fitted to the bike or having the lever be the highest point and both master cylinders running in a vertical line upwards ?
This style of lever suffers from a loss of power transfer from the piston travelling left to right with the blade travelling up and down. How much is lost I wouldn’t be able to tell you
I’d go for a trialtech lever if you have the option.