The gear ratio only tells you the ammount of revolutions the spool turns for every revolution of the handle, 6.3:1 means the spool rotates 6.3 times for every turn of the handle, nothing more.
Most baitcasters with a 6.2-6.3: 1 gear ratio have a IPT ( inches of line the reel picks up efor every turn of the handle ) of 25"- 30" but there 's huge difference in speed between both, while with one you crankbait may run fine with the other it won 't, or while with one you have to reel in like mad to keep your buzzbait on the surface with the other it 's a piece of cake.
So, when you purchase a reel don 't look at the gear ratio as a measure of speed, look at the IPT.
"Burner" reels are burners only if they are actually picking up a lot of inches per turn, for example, most burner baitcasters have an IPT of 30", about half of all the spinning reels available in the market are faster than "burner" baitcasters. If you really want to burn baits look for the mid sized spinning reels, 2000-2500 sizes have an IPT of 30"- 33" ( Examples: Sahara 2500 = 30", Symetre 2500 = 31", Stradic 2500 = 33", Regal = 29.5" ).