I repeat -
It is NOT the razor,
It is NOT the blade,
It is the razor AND the blade that need to be assessed as a unit.
So while you might have a razor with a large blade gap (see below) and considered aggressive sometimes you will get better (DSDF as to what better means) results with a different blade.
For many the generally considered mild Tech pairs well with a Feather blade for a smooth, comfortable result. I get a great result with a Feather in razors commonly considered aggressive - probably better than in milder razors. Maybe it affects my technique I don't know. A 'gentler' razor in an aggressive razor may well provide a rubbish result.
Blade gap is also a fairly rudimentary measure of 'aggression'. The head geometry, how the blade is 'presented', blade exposure and blade curvature are all factors. Theoretically most can be compensated for by varying your technique and it commonly takes me a couple of shaves to adjust to a different razor/blade combo (but maybe I'm a slow learner).
The weight and balance (which impacts the pivot point) of a razor also come into play.
@Pjotr loves his lightweight bakelite razors, others prefer a heavier one. Some prefer long handles, some shorter. Handle diameter also affects the shave.
Apart from the extremes we are really talking about fairly marginal changes which largely come down to preferences. Stick with a mainstream razor, try a few different blades once you have mastered one. When you can tell the differences around blades on one razor add some different razors into the mix - if you want to. There is no compulsion to try everything.
EDIT: Just saw post above - yes, loaners are possible around here. Try and see!