old (actually, current) formula = 220 + (2 * (level-1))
new (actually, proposed) formula = 220 + (1.4 * (level-1)) + (1000 - level) / 15
Level 1: {new: 286, old:220}
Level 25: {new: 318, old:268}
Level 50: {new: 351, old:318}
Level 75: {new: 385, old:368}
Level 100: {new: 418, old:418}
Level 125: {new: 451, old:468}
Level 150: {new: 485, old:518}
Level 175: {new: 518, old:568}
Level 200: {new: 551, old:618}
Level 250: {new: 618, old:718}
Level 300: {new: 685, old:818}
Level 350: {new: 751, old:918}
Level 400: {new: 818, old:1018}
Level 450: {new: 885, old:1118}
Level 500: {new: 951, old:1218}
Level 550: {new: 1018, old:1318}
Level 600: {new: 1085, old:1418}
From this, we can draw a few conclusions:
1. With the proposed system, a level 1 is definitely faster, now about the speed of a current level 30.
2. With the proposed system, a level 50 is noticeably faster, but only about the speed of a current level 60.
3. With the proposed system, a level 100 is exactly the same speed.
4. With the proposed system, a level 175 is the speed of a current level 150.
5. With the proposed system, a level 250 is the speed of a current level 200.
6. With the proposed system, a level 400 is the speed of a current level 300.
7. With the proposed system, a level 550 is the speed of a current level 400.