Not Japanese PS3s, just Japanese PS3 AC4. English X360 AC4 also has 1.6. Can't remember the boost speed. 
Its been ages since I last played AC4. This is all I could remember from the top of my head. Been playing For Answer. XD
As far as I can remember, Hogire main boosters have something like 12,500+ normal boost power and 50,000+ quick boost drain while Aaliyah main boosters have 15,000+ normal boost power and 90,000+ quick boost drain. All I can say is that the speed of Hogire now resembles that of Aaliyah before, while Aaliyah got an even bigger speed boost. All part's APs have been increased (roughly by 1000 AP) and the EC-0300 and EC-0307AB's ammo count have been decreased [EC-0300 down to 17 shots and EC-0307AB down to 45 shots (note that it fires 3 shots at once, so it can only be used 15 times now)]. On the plus side to the EC-0300's ammo decrement, its firing rate has been increased dramatically from regulation 1.4. In 1.4, it had a veeeerrry long reload time (forgot how long it took lol) while in 1.6, it had a reload time of around 2.5 to 3 seconds per shot, making it nearly spammable when used in 2s. All blade damage and PA piercing capabilities have been increased (although only very slightly). On the downside, only the 07-MOONLIGHT had a negative change: Its drain had been increased by around 20%.
On a side note, AFAIK, Aim Precision doesn't affect a normal weapon's performance. The Aaliyah arms sure work wonderfully with my MR-R100R. From what I understand, Aim Precision only matters when it comes to sniper rifles, and nothing more.
Its been ages since I last played AC4. This is all I could remember from the top of my head. Been playing For Answer. XDAs far as I can remember, Hogire main boosters have something like 12,500+ normal boost power and 50,000+ quick boost drain while Aaliyah main boosters have 15,000+ normal boost power and 90,000+ quick boost drain. All I can say is that the speed of Hogire now resembles that of Aaliyah before, while Aaliyah got an even bigger speed boost. All part's APs have been increased (roughly by 1000 AP) and the EC-0300 and EC-0307AB's ammo count have been decreased [EC-0300 down to 17 shots and EC-0307AB down to 45 shots (note that it fires 3 shots at once, so it can only be used 15 times now)]. On the plus side to the EC-0300's ammo decrement, its firing rate has been increased dramatically from regulation 1.4. In 1.4, it had a veeeerrry long reload time (forgot how long it took lol) while in 1.6, it had a reload time of around 2.5 to 3 seconds per shot, making it nearly spammable when used in 2s. All blade damage and PA piercing capabilities have been increased (although only very slightly). On the downside, only the 07-MOONLIGHT had a negative change: Its drain had been increased by around 20%.
On a side note, AFAIK, Aim Precision doesn't affect a normal weapon's performance. The Aaliyah arms sure work wonderfully with my MR-R100R. From what I understand, Aim Precision only matters when it comes to sniper rifles, and nothing more.
[All systems online. Kojima output normal. Synchronizing AMS Compatibility... Done. Engaging Primal Armor... Done. All systems green. Firing main boosters.]
"Blackwing, let's fly!!"
"Blackwing, let's fly!!"
