So I'm trying to figure out the difference between a battlemage and a spellsword, but YouTube, the Wikia, has me all kinds of confused.

Here's what I think, before I started researching, what a battlemage and a spellsword sounded like

A Battlemage: A mostly mage, in heavy battle armor, who may uses swords sometimes but is mostly a heavy offensive mage right?

A Spellsword: A 50/50 mage warrior who uses light armor, and is almost like a scout, using the best of both worlds and is quick and agile.

Then I started researching and got conflicting results.

It was mostly between Oblivion descriptions vs Morrowind descriptions, because they are so contradicting. 

So in Morrowind it says this: Classes (Morrowind) <--Also look at this page for their attributes and main skills.

"Battlemages are wizard-warriors, trained in both lethal spellcasting and heavily armored combat. They sacrifice mobility and versatility for the ability to supplement melee and ranged attacks with elemental damage and summoned creatures."

"Spellswords are spellcasting specialists trained to support Imperial troops in skirmish and in battle. Veteran spellswords are prized as mercenaries, and well-suited for careers as adventurers and soldiers-of-fortune."

Now Oblivion: Classes (Oblivion) Take a look for skills and attributes too.

Battlemage: "Able to resolve most conflicts with either spell or sword. They are a deadly mix of scholar and soldier." Battlemage (also in Oblivion, they start with no armor stat bonus. In Morrowind they start with a heavy armor stat bonus)

Spellsword: "More nimble and athletic than the sorcerer, and better suited for spell-casting than the knight, their attacks are unpredictable. Students of combat and magic." Spellsword (Class) (Also in Oblivion they are now heavy armor instead of light/medium armor)

So I'm just trying to figure out what the difference is and which can be difinitively defined as what. It seems it was Bethesda who truly changed things up from Morrowind to Oblivion.

So what do you think?