For beginners and not only! How to download TE-Lite.

The games are different. You can set the same options in the Game options, but the games will be different.
The main differences between Full and Light:
1) heroes are different
2) buildings are different
3) magic is different
4) Full has some classes
About Full. In general, the creators decided to make it so in Heroes that all towns are equal in strength (they are still balancing them) and the game is more interesting.
For example, Dungeon has fewer Troglodytes at the start; Grindan has a different spell instead of Slow at the start; Conflux mages start with 0022 (instead of 0033), Town Portal is in Fire, Slow is in the 2nd level; Necropolis requires 8 Sulfur to build Liches (instead of 10 as in SoD/TE-Light), Tower has the Lookout Tower already built in the town, Barbarian's 2nd-level units can be upgraded at 111 (making Tyraxor popular for this), building Cyclopes requires 5 Sulfur and 5 Mercury (instead of 20 Crystals), etc. And naturally, the convenient interface.
Vic kept the convenient interface but canceled all the "innovations". And the result was SoD with the TE interface and possible settings (e.g., second-level unit growth, Necropatch, etc.)
I can't be bothered to study TE-Full (although I play it sometimes :) with a small limit), although it is also interesting, but the settings in TE allow you to say that TE-Light is better than SoD.
P.S. Don't bother with the DATA folders. Better copy TE (TE-Full) and make Light from it. And you'll have both Light and Full. And you won't have to bother with settings. Or just play TE-Light. Then you also won't need to change the DATA folders.