There are slight differences between the final output of either a condenser or diffused head. It's the nature of getting the same end result with different systems.
Think Manual gearbox and automatic gearbox in a car, they get there, but do it via a different method.
Having used quite a few different amateur and commercial enlargers of both persuasion, I would suggest that a diffused enlarger, fitted with a colour head capable of handling your largest format, is the way to go.
There are also diffused enlargers with different modules for either B&W or colour. The B&W module will give you a slightly greater range of contrast in the extremes, compared to a colour module (head) but if you have reasonably normal negatives, then virtually any colour head should be able to give you sparkling B&W prints, and, if you so desire, sparkling colour prints.
Realistically, a 4x5 enlarger would possibly be a better alternative if you can accommodate one. That size of enlarger is designed to a commercial standard, and as such is capable of working with various format sizes, usually 35mm right through to 4x5.
I cannot suggest what to look for as I don't really understand the major formats used in the USA market.
Mick.