Judging from the experiences I've had owning both marques, I can whole-heartedly agree.
Out of the 4 Kawis I've owned:
1984 GPZ 500 - it fried its CDI twice. Total mileage about 50K
1987 ZX10 - fried its alternator. Total mileage about 30K
1991 ZX11 - no issues
KLR650 (2003? I forget) failed fuel tank and intermittent ignition issues. Total mileage about 6K
2009 Harley Dyna - no issues apart from a severe allergic reaction to a Subaru...