I can say that the most noticeable similarity between 2 guys is traditional Jananese Eyes ^^
Eventhough, one seems to be kinder….
& one seems to be harder (I mean it’s colder and more dangerous 0^^0 )
Another example is both guys act as school boys
Oguri Shun acts as Sano Izumin in Hana Kimi series: a quite but ideal boy friend to me: caring, brave, talented, kind …
while Daito Shunsuke acts as Kiyama in Tumbling series, a naughty, aggressive boy but very brave, honest and loyal friends!
One is about to grow OLD…
One is still Young and fly…^^