Faster is perhaps not the right word. See above. Search function is useful sometimes. 
TLDR (not long actually): It takes more data into consideration, i.e. reflects a different rating distribution. The numbers don’t mean the same thing.
Let’s try to explain it in detail by ignoring how rating points are calculated.
Imagine a Go player population of N=3. Let’s say you’re one of them and you’re the second best; your skill level is (N-1)/N=0.67. Now 7 new players start to play Go. Suppose their skill levels are 4…10. You do not “actually” improve in terms of reading or strategizing etc. But you’re still second best, so your skill level is now (10-1)/10=0.9.
You get bored of playing newbies and you start playing megablitz, which only the top 5 Go players in the pool play. You’re still #2 so your megablitz skill level stabilizes at (5-1)/5=0.6.
You think you deserve better, so you start playing correspondence. We all know corr players are a bit slow, which the #1 player doesn’t like - only the bottom 9 players participate. You are now #1 in that category so your skill level is displayed as (9-0)/9=1.0.
As you can see: all numbers are different because they refer to different (sub-)populations of players.