I haven't shot the Lott, but I have shot the Win. I'd be happy with either and wouldn't feel handicapped by either. Most of the folks I know in Zim and SA have Wins too...
Daryl's point is fair - yes there may be a pressure difference, but does it really matter in today's bolt guns? Or even Mauser 98s? In a double, I'd probably feel happier with the Lott, but neither would be my first choice of calibre in a double anyway!