I went to Denso Global for the required spark plug model for my Corolla GLi .. It seems I used the same plugs with Altis & Vios ..

Denso Global list it as K16PR-U11 ... But according to the Parts Man of Toyota, in their system my car uses the same plugs as their current altis which is K16R-U11 ...

I then noticed that both plugs differ only on the letter P which means projected ..

Does this mean I can use any of these plugs (K16PR-U11 & K16RU-11) ???

Which is better for daily driven, projected or non-projected ????