Hmmm yeah that is right... missed that compare, I guess in that case AB isn't so bad. It just seems so much worse because of the limited number of girls total and the fact that 4*s are so common.
Flower Knight Girl: 255445855
Yea, I quit FKG in part because $300 didn't get me one single top-tier rarity girl. If I recall correctly, even event FKG girls are only 5 stars (though again, it's not like I've played that game in a long time). Armor Blitz meanwhile guarantees you a top tier rare every 28 days for free, as well as every 7500 cores (even before you consider the 1% chance to get a 5-star from pure RNG)
People in mobile Armor Blitz say they got 10-13 out of 15 of their main tanks to be five-stars within only 6 months, for free. Admittingly that probably includes at least 3 event-tanks that were five-stars (so I guess you get 3 events + 6 log-ins + 1 lucky factory draw and that puts you at 10 right there)
...actually, looking at how fast people are filling up their teams, one major issue I think will come up in the future is that you only need 15 tanks. That combined with how every new tank needs to be manually levelled up from level 1 will eventually totally kill the joy of looking forward to getting new tanks.
FKG doesn't give a free 5star girl every 2 weeks, it has an event every 2 weeks with an obtainable 5star event girl. There's a difference.
6* is the biggest rarity in FKG, but dont forget there are NO 1* girls. So the tier system starts from a 2* up to 6.
Which means 5 tier system, the same as in AB.
Rather than using the numbers you should be looking at the overall rarity. Gold in AB is a 4* in FKG 5* but the tier level is the same > A Gold tier.