Shiki respected Roger above all ... and I'm sure Roger is above all ... but gap is debatable
Roger himself seems to respect Garp power on highest level that there can be
I never said Garp isn't crazy strong or Roger doesn't respect him
But Roger respect many Top Tiers, doesn't mean they are all on same Level
However, with Shiki, we got a direct comparison & a claim from him
Where we saw how he differentiated between Whitebeard & Garp
And when he attacked MF, he said it's impossible that Marines defeated Roger
Also when Garp was talking to Ace, it was clear that he was talking about someone superior, not someone his Equal
Sengoku too said that WB could destroy the world & all of them might fail to stop him
Not to mention that WB himself didn't seem to consider Garp his Equal in MF
Also when Teach acquired Two DFs, he was fighting both Garp & Sengoku
And he didn't consider them able to stop him
Garp is Super Strong & he can fight with Pirate King, but i cannot imagine him standing as WB's Equal
That's crazy, you're underestimating WB too much
If we follow your Roger Respect logic, he told Marines only bring Garp or Sengoku, so he also showed Sengoku same Respect concerning his Power. Does that mean, Sengoku is also on WB's Level?!