Why do I find it easier to get out bunkers with my 54 degree than my 60?

I have a low bounce 60 degree vokey (L grind) and mid bounce 54 degree vokey (s grind).

I know my fault is often I take too much sand so I need to swing quite fast to pop it up and out.

with my 54 degree I get it out 9 of 10 (or probably more 19/20) but the 60 is probably like 50/50... not only that I feel as if I can control distance a bit better with the 54. I'm not really complaining as I know which suits me better and don't have much time for practicing bunker play and the time I do have is better suited to other parts of my game

But I would like to know why when most people say a 60 degree makes the job much easier?

short answer the problems of steep & too much sand is all around set-up then technique issues - set-up is key to be able to have a more shallow AoA & just take the $ note shape sand the ball is sat on out up & forwards

with a club with more loft & less bounce & being steep that tends to do 2 things - present the leading edge as first point of contact with a de-lofted face so too much sand with the point of contact also being a ways too far behind the ball

to use a 60º with less bounce to have the greatest margin for error you'd have to open the face up some to be able to stand any chance of using the loft & the leading edge not dig down some - but then the technique would also have to be different to be able to maintain the open face & bounce through the sand

if you managed to maintain loft & bounce with the open face - then the issue would be the ball is goin to come out real high so would have to through practice learn what distance bunker shot range you got by doing this & only use it within that distance range

the 54º with more bounce is giving more margin of error in the contact with the sand to still get some height & distance on the ball to be able to get out of the trap a tad easier even though the AoA is maybes tad too steep

couple of things to think around generally over bunker set-up - is if you set-up more like the same distance ordinary pitch shot - so tad narrow stance with normal stance height that is going to encourage a steeper AoA & marry that up with thinking of swinging more along a direction of path that's at the target (flag) then that also will encourage entering the sand further behind the ball - so created the perfect storm scenario of over steep & a point of entry ways too far behind the ball

bunker set-up have a look at taking a wider stance with a tad more knee flex so lower stance height - you can feel that it's goin to be a ways easier to have a shallower angle of approach into the sand set-up this ways - as long as that set-up lower stance height is maintained through the motion so no standing up as the club goes back or in the downswing

point the face/leading edge of the club at point you want the ball to exit on & have the foot line just a tad open to that target line aim to contact sand an 1" - 11/2" behind ball & swing the clubhead along the line of the feet (not target line)

swing length around hands shoulder height goin back to around shoulder height or tad higher finish position - but with the technique it's really important it's not just a "pick up arms only swing" - body rotation sync-ed to the arm-swing is the engine
as ever got to practice this stuff to get any good with any consistency of shot distances - can't just wait until the shot turns up in a round