Is the rule that the least amount of wing loading the more the glider will float or fly with less wind?

Im looking at the Icare website and see that the acrobatic gliders has more wing loading than the thermal gliders and this created a confusion to me.

What other aspects are involved?

Quote from the site ICARE : the Jantar glider "This model is very easy to fly, probably one of the nicest to thermal, easy to histart or winch. It has very smooth and predictable handling, on the slope you will find that it can fly in pretty light air."
wingspan is 95"
and the wing loading is
40 g/dm2 (13.4 oz/sq. ft.)

And this the aerobatic and racer glider Swift S1 with a wingspan of 75"and a wingloading of 36 g/dm2 (12 oz/sq. ft.) .

Shouldnt the thermal glider have less wing loading?