so far, the generalizations are accurate, but keep in mind that you have several different types of Labella flats, probably 4-5 different guage sets, and then some people mix and match on top of that ... there is an XL gauge that I have never seen, but I cant imagine that they are as high of tension and as fat sounding as the heavier gauges .. the FL's and the FM's are also different in both tension,playability and punch ... this week, I am loving the FM's probably better than anything else I have, I have them set quite low on a Jazz as I find I dont need near the attack with their punch ... next week though, it might be the Chromes, as thats the way I seem to waiver with flats and EQ'ing ... I have found its really tough to judge flats on outside recommendations exclusively, as sounds are quite subjective, and the feel can be very different to each's preference as well ... I have actually bought similar inexpensive basses, just to try different sets of strings in an A/B/C/D type direct comparison ...
.. then, you add in that I have found flats sound different with some amps, and even whether a cab is sealed or ported can make a difference ...
bottom line, I think you will like Labella's, no reason I have found not to, its just a matter of finding the gauge that suites you best ... but only you can decide if you like them 'better' than the next brand ...
BTW, Jason from bassstringsonline.com is a regular here, and he is probably the one I would check with when it comes down to verbally comparing characteristics of one brand/type to another ... he also sells to forum members at a discount