Depends on how you vape I use a Cyclone at .8 ohms and a 18490 last 6 hours plus or all most 2 3mil bottles
the 18650 in the Grand will last longer but the vape quality is the same with the Mini and the 18490
I don't know squat cuz I'm a brand new REO user but 100% agree with this ^^^^^^^^^^^
I change up flavors 7-10 x's per day to avoid wonky taste buds. I don't vape 6mls of anything at one time (or I'd have to buy around 10-15 REOs and rotate them up, a lot!) so the 3 MLS is perfect to either vape away or change out quickly.
The only negative I can think of, although I'm not sure because I've never seen, held or used a Grand, is the squonking hole on the mini is small. With larger fingers, I could see this being a bit difficult. Kinda wish the design had the squonk hole on the side of the REO versus the front. So the squonking could be done like a gun trigger so to speak, and can be done with the inside of the fingers versus a thumb.
And the fire button on the other side for the thumb versus the top of the mod, again like a gun/the hammer. If this makes sense.
I only have 3 Grands, 3 18650 Woodvils, , 2 VV Grands, 1 VV Woodvil, 1 LP Grand, and 1 Mini. So I guess you understand I can't let one go for testing. Sorry about your luck.
The cut out for the squonk hole is the same size for both the Grand and the Mini.
Thanks guy and gals for your input. I just ordered a LP mini in Black Wrinkled. Was thinking LP/SL mini but, realized my boss(wife) would see the difference so went with something that will blend in with Pete. She has trouble with sizes!! Also have some 6ml bottles coming. Now the pacing begins again.