True the weight, the attitude, the range... moreover, the XC power delivery seems not to be that effective: despite to the higher peak power is slower (only "cruise" gearbox setting?) and lazy low down.
Talking about the rear linkage, is exposed - yes - but gives a better bottoming resistance (the [quite bad] GS SACHS is a PDS-like shock, while the upgrades from WP, Ohlins and so on, aren't), so 15-15.
but, well... The GS is a great base, more expensive - but does requires some modifications, especially at suspension department (competence + time + more money).
So, if you want & are able to deliver these three magic pearls, go for GS - otherwise Tiger is overall better just out-of-the-shop.
For the average rider
them both are able to do the job, anyway; all the rest is matter of tastes and expectations: we can talk for years about what's better