They are shorter than Empress and Underfire but then everything is, both ranges being more 32mm than 28mm.
That said, the Mofo troops aren't that much shorter. I mix a variety of figures. Underfire, Empress, Eureka, MoFo, Mongrel, the old Dadi i Piombi, Radio Dishdash, Crooked Dice, TAG, Gringo 40s and a few others. Once based and painted they are hard to pick out on the table, Even the Radio Dishdash figures which are slim and slight mix in with some basing magic. The only modern/ Cold War range I've got that really doesn't fit in with anything else are the TAVR Royal Navy figures. They look like children compared to the rest. Pity, as they are decent enough sculpts.
Naturally, when it comes to size YMMV.