Any CBR600 from 1987 on will comfortably "deal" to any GSX600, Hornet 600, or SV650, given the same rider having a go on each one.
However the GSX is oil/air cooled so no water cooling system to worry about, has 80% of the handling and "go", and is easier on tyres and petrol than a CBR, so cost of ownership is lower. I used to get 300-330km out of a tank when commuting on the GSX, and had no trouble keeping up with more sporting tackle when necessary - to a point.
A GSX600 is a lot more comfortable when doing long distance than a CBR or a Hornet with really good weather protection, a fuel gauge, and as already mentioned, good range.
The SV650 naked has a more upright riding position than the faired SV and could be considered more of a sport tourer if you add a screen and a pack rack.
For some reason Suzuki put slightly better suspension on the GSX than the SV, and every Hornet 600 I tried was squidgy. The CBR's supension from '92 on is massively superior to any of the other bikes mentioned, provided it is a low KM example, late model, or has had the suspension reconditioned at some point if it is a higher kms version.
Don't forget the Bandit 600. It has less power than the GSX600, but many of the same advantages and some people reckon it has more character.
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