Maybe late for you, but for others:
It is hard question. I like them both. But while MOM (Master of Magic) is all about magic, SF CE is little different. You have magic book but I found lots of magic is useless and sometimes not well described ( I have no clue how to summon Ent Titan). But I like battles in SF CE, they are done very good, also I like units.
MOM, is more like expanding your land, building cities, armies and research spells and use them. You researched spells can be used in battles, others can be used on world map, and some are mixed (on map or in battle)
SF CE is more exploration game, doing quests, collect armies,.Your spells are very costs and not so much helpfull, (later in game). and cannot be used in battle. You have tower as main domain and you level it up. And you have alchemy which is intesting thing, you can mix-up some potions or "things" which can be used in battles.
Both games have hearoes (MOM can have unlimited heroes If I remember correctly), and SF CE have limited numbers of heroes, depends on you Tower level. Each unit and hero can level up to 15lvl. (in MOM it is different level?, Now I can't remember).
Post edited March 12, 2023 by Ra9000