Hey Jeff
I had a couple of these. I've had my bladder removed now but it was more because of the grade (G3) and presence of CIS than the location of the tumours. I think also some surgeries might be made harder (neobladder) depending on the extent of bladder neck involvement. The fact I had a few bladder neck tumours hasn't stopped me from having a successful neobladder operation. I think the proximity of the bladder neck to the prostate worries some doctors into a pre-emptive cystectomy. But again dependent on exact position, stage and grade.
As far as resection went, bladder neck tumours, I was told, can give a greater tendency to spasm after the surgery. I found this to be true in one case but not in another.
Hope this helps
Best Wishes