Here Is A List Of What Levels Have Been Changed And A Few Of The Changes

1
3
5
7
8
9
10
11
12
14
16
19
20
22
23
24
26
27
29
30
35
36
37
41
43
44
45
48
1B
9B
12B
17B
22B
33B

Drop Table Chances Are Now 
80% Nothing 
8% Weapons And Items
12% Ghost

Demos Have Been Changed And No Longer Act Wacky

Most Of The Changes Are Added Weapons
Very Few Levels Changed Spawn Delay Of A Few Monsters 
Removed Some Monsters Due To Unfair Difficulty And That There Was No Telling Where They Would Be
A Few Levels Also Had Some Tile Changes But Nothing Noticable Just Enough To Change The Gameplay And Make It A Bit Easier For All Players