I dont own the Rudy, but for me personally Bromwell is best premium vs. all others I bought to date.
Good earning power, even if I need to use gold sometimes for higher tier heavies
By far the most fun tank to drive in my entire garage (dat speed, decent gun etc)
Flexibility allows me to make up for poor position decisions early in game, bail out of tight spots and flex to save the other flank
Flexibility also allows it to be fun on virtually every map which isnt true for other tanks that need vision maps (where they go) or brawl maps to do well
Took a while to learn the tank and esp, how deal with gun handling, but after 20 or so games and some help, I got there
Beware, this is my only premium that I triple MOEd, so I may be biased.
Personally, while tempted by Rudy, I will pick up Type 64 when on discount 2nd half of Dec. Seems to have similar traits to Bromwell.