I check in with a Rescue cert and a nitrox card, My buddy checks in with a trimix and an advanced nitrox cert. Do you really think the crew on the boat will treat us differently? I doubt they would even know how we checked in.
We are doing a drift dive in SE Florida. I have more than twice my buddy's dives and twice the number in local conditions. Who's the better diver?
Its not really the "better diver", more that one can easily forget that you need to dig out the noddy PADI qualifications that are far superseded by one's normal dive level. Some of us literally never do "recreational" diving -- rebreather, decompression, depth, redundancy, gas switching, rich mixes, solo; mostly all of the above.
Learning point: don't throw away the early-learning-diver PADI cards and bring them to holiday destinations.
Whinging point: nitrox cert... Like they're going to fill your tins with any mix that's richer than you need for the dive... Of course everyone has to check their gas in case someone's given you 100%. However, a boat-supplied set of "filled" rental cylinders are not going to vary.