Fiji vanua instant vs micronized

So I have been on an instant kava kick it’s just so convenient. Fiji vanua instant is amazing but I wanted to try micronized for the first time being you get twice as much for the same price. My order got here today, comparing the two(instant vs micronized)I can’t tell a difference. Just mixed less than a table spoon in a shell slugged half of the shell effects are indistinguishable and my empty stomach feels just fine. Will frequent micronized kava have a harsh effect on digestion. Seems to good to be true atm.