Strictly speaking, there is one difference: the Buns of Steel perk (gives you always high butt tone) overrides Buttslut's 'always low butt tone' effect and is mutually exclusive with Bubble Butt.
Short version: since you're going for a more lust-based combat style, I'd say you should go for a shield Tech build.
Long version: the difference between Attack Drone and Shield Booster basically comes down to 'durable shields + more powerful and varied drones*' vs 'nigh impenetrable shields'. I find that as a drone Tech with maxed Intelligence and the best +Shields armour and shield belt, my Steele's shields rarely go down even without using Deflector Regeneration; I suspect having Shield Booster instead of Attack Drone would simply mean she could get away with using different armours. However, the damage bonuses from Attack Drone and Drone Control only affect your drone's physical damage, not their lust-based damage, so if you're going to use drones for lust-based damage there's not much point in going for a drone Tech build.
*get Tamwolf in its undamaged form, so the repair station in KQ2 upgrades it to also deal Electric damage; can also obtain a laser drone accessory (deals Burning damage) in the Deepsea Biolab Quest. None of these will mean much outside RP purposes if you're going to use Domwulfe anyways.
Also, Attack Drone's +3 Shields per level only applies when you have no drone accessory equipped, so with Domwulfe equipped, the difference between Attack Drone and Shield Booster is 8 Shields per level, not 5.
Bimbo Intelligence increases damage bonuses for Paralyzing Shock's Deadly Shock upgrade, Charge Weapon, both Disruptors, Boosted Charges, Shield Hack, Charge Shield and Drone Control, the stun chances for Paralyzing Shock and Overcharge, the shield recovery from Deflector Regeneration and Power Surge, the accuracy bonus from Fight Smarter, and the Shield Defense bonus from Advanced Shielding. So yeah, it affects every Intelligence-based Tech Specialist ability.