I prefer the original however if you are going to change the lineless 3d. The first one you posted looked a bit like 'Tetris'.
In off 'crypto world' marketing changing your logo can create a lot of headaches and expense, plus people get used to a logo and like stability. People trust stability - what are you telling people when you change your logo ...?
How does the new logo look when on printed material etc. The logo should look good on and off screen. Is the logo still recognisable in b&w. How does it look postage stamp size/ A3 etc
Are you creating a brand logo - i.e. are all other 'products' going to follow this logo design in some format or are each of the 'products' going to have different logos. If the later is the case then I think it may get confusing.
Have you got a brand 'tree' in mind
IMHO - you need a brand logo first then let the other 'product' logos flow from that. Similar to the idea/images 8bit posted.
Anyhow your choice...
kw
PS does this mean you are going to upgrade the wallet - qt with the new logo - please don't I had soooo much trouble syncing it -