I have both the tour and the midsized bag... I use a rovic cart with E wheels attachment and by far the midsized fits it better. I should have tried the midsized first. The real only noticeable difference (staff to midsized) was 1. more fake leather on tour bag (fades less) and 2. Midsized is 9.5 top and tour is 10.5. It is indeed much bigger.

I NEVER carry. I use an electric trolley such as yourself and I've had so much bad luck with the 14 way divider bags as I work at a golf course and play there every day as well. The bag for me is a very HIGH WEAR item. I bought the midsized in hopes dividers wouldn't break and I would get longer than two seasons out of a bag.....

Best of luck

I used to have the tour bag a couple of years ago, I got a midsize one start of last season as the young assistant pro ordered the wrong one.
It’s been a great bag no complaints, but I’ll be going back to a tour one this season as I prefer the bigger bag. ️‍♂️