Age, you are basing the games in comparrison like comparing apples to oragnes.
if you take time to read the SFC, SFC II EAW, and SFC II OP game manuals, you will read inside the front cover that those games are based off of the board game Starfleet Battles and not on Star Trek the TV / Movie series.
Cloak in SFC titles before SFC 3 is true cloak per SFB and FYI it is a true cloak in the sence based on TOS series with William Shatner as Kirk..
for reference see the episode : Balance of Terror where they track the approximate location of the cloaked ship with motion sensors...
in TMP, they could trck cloak by exhaust (ion) emmissions, however the results were approximate until the vecinity got saturated, at which time the ship looking would lose track
Cloak did not change until TNG...
SFC 3 was an attempt to try to merge SFB components yet try to keep true with TNG timeline at the pre-Nemisis period in the time frame (SFC 3 leads into Nemisis movie supposedly)
Cloak is the ability to prevent the enemy from tracking.. in TNG it is represented by total wiping out of tracable emmitions and visual references with exception of spacial distortion and energy surges (although i can't see how they did away with the emmitions of exhaust)
in TOS, they were not able to see their target, but were able to approximately track it by exhaust trail and by motion sensors.. why do you think the Rom went to full stop???
to represent it in SFB, instead of a full visual cloak (although there is an alternate rules set to allow for visual cloak) they adjust damage that a ship takes and gives ships shields.. it is hard in SFC titles (not SFC 3) to damage a cloaked ship just firing at it...
you have to use T bombs to flash the target so tracking weapons can fire, tractor beam so you can retain a lock on enemy ship for full damage, or wait until they uncloak...
In SFC 3 you can ping the enemy and / or use probes to find cloaked ships, then you can tractor, but the cloaked ship is completely defenseless if located, with exception of AV.... ECM and shifting differences (ranges confused within the computer) is not taken into effect... thus the Cloak in SFC 3 is relatively weak with exception of the surprise effect of just popping up.. but any good pilot will keep their hand on the HET and tractors charged to nail a cloaked ship if they are stupid enough to be in close range.. and on top of that, with HET and a high speed, it is possible to keep a high AV against the popping up Cloaked ship.. thus making their shots useless after waiting all that time to charge up...
here is a damage chart for Cloaked ships in SFC II OP :
While under cloak, Weapons damage is reduced according to the following chart:
33.3% chance weapon does normal damage.
33.3% chance weapon does 1/2 damage.
33.3% chance weapon does 1/4 damage.
and those charts only hold up IF you weapon hits for damage... and cloaking in OP will make tracking weapons lose track, depending on how fast you are going.. Plasma will just fizzle out and missles disappear because lock is lost.
so which SFC has the better cloak??? I think SFC OP does...
as for SFC 3 weapons, they are more canon than previous SFC titles.. SFB did not follow canon.. as such you are right with the disruptors... Klink primaries in all series is the disruptor, their secondary is the Photon. In this SFC 3 is true to canon. same goes for Romulan ships with disruptors and plasma.