If you look at the old Stardate article "Before the Succession Wars," it lays out in great detail the backstory of the BattleDroids setting. All the odd terms in "Tales of the Black Widow" is consistent with that.
The opening history section in the first edition of the MechWarrior RPG explicitly says it was excerpted from the Stardate article.
It's the same in broad strokes, but very different in the details. BattleDroids fell much further, technologically, and couldn't manufacture anything new by 3025 - no new BattleDroids, no new K-F drives, no new fusion engines. If you didn't have BattleMechs, you had to go after that oncoming Marauder in a jeep with a MG or SRM-2 stapled to the roll bar.