Just always bear in mind: A given set of sizes in bass strings (let's say, for instance, the usual 45-65-85-105 four-string set most companies offer) will vary in feel and tension from one brand to another, some not as much as others, and then some will have a marked difference. Go from round to ground to flats (or exposed-core) strings, and you may feel a big difference and the action may need to be tweaked one way or another.
String-making (like pickups) is a Black Art, and T-I's can be right at the top of that list in the 'gee these are real close to my old sizes, but man they feel way different'. Great strings, but they always provoke a mental picture of Teutonic hard-headed sureness to me.