I purposely did NOT buy the 0801. I've had a lot of ZT's, and as you've said...many are pocket bricks. I use my folders very casually and don't need heavy-duty knives.
The ZT 0801 weighs 5.8 ounces; the ZT 0808 weighs 4.3 ounces.
In terms of closed lengths, the 0801 is slightly longer at 4.7" compared to the 0808 at 4.4". I have a rather large hand, and the 0808 fits my hand just fine.
I've owned quite a few flippers, both manual and assisted. I like the manual flipping action of the 0808 very much, and consider it excellent. I could not ask for it to be "better."
I have stopped buying folders that weigh more than five ounces. Both the large Sebenza and the Umnumzaan are both five ounces or less, and their reputation is well-known.