I assume that this question is in response to the one I asked on your site about the C4U 3x3x6.
Only partially. Your question got me thinking.
I was rather skeptical about the 3x3x5 versus the 3x3x7 - I thought they would be very similar solve process - both being odd order puzzles. I bought the 3x3x5s after a quick glimpse at the SuperantonioVivaldi videos and interestingly they solve very differently with the 3x3x5s being more like a regular cube (with some obvious differences).
The 3x3x8 is a very odd puzzle - it is a 3x3x7 with an extra layer tacked on. This means that it turns eccentrically and you end up with a rather asymmetric shape with a protruberant layer which turns independently! This is a very enjoyable puzzle to solve.
All of this is very helpful. Thanks.
Would I advise buying ALL of these? Absolutely! They are pretty reasonably priced, have the usual Witeden quality and all solve differently - there you go, an instant extra 6 puzzles which you MUST buy!
<sarcasm>Great. Thanks! (More money gone...)</sarcasm>
The the 3x3x7s and 3x3x8s don't have the normal-height E-layer, just a bunch of narrow layers. They also don't have the perpendicular E-layer edges. The 3x3x7s are especially interesting to me because I have the C4U 3x3x7 and it has a normal-height E-layer between 3 and 3 narrow layers.
Which means they are all different and you really should have them all to be fair
And Pete, thanks for this as well. Again, very helpful.