Kaveri has thrust of 50-73 which was downrated to 46-48 for dry variants IIRC.
Also kaveri is much heavier than m88
m88 is some odd 800kgs compared to 1000+kg and 1100 kg of 404 and kaveri
Weight Wise M88>404>Kaveri
M88 is also mature tech wise (MTO,Life cycle reliability etc) it has higher T/W...