I already know this fact. Didn't discuss here cz our dear keyboard warriors would pounce on me like nasty barbarians waiting for their pray Instant fatwaa k main pagal hogya hoon. The reason you mentioned is absolutely correct, Xli has different sensors than GLi, I had Gli 2009 and I literally lost a race against Xli with about 1.5 cars gap!
This happened 5 consecutive times, I may have videos with me as well somewhere. I won't believe that Xli was stock. Until that guy did the same thing with 2 more XLis. lol.
I learned this thingy about sensors from a dear friend who is also a drag racer and loves to play with motors. I didn't confirm it since the knowledge that guy has is usually very credible and owing to what he does all day, I believed him. Now you've mentioned the same thing.
Just for reference, I'll try to get part numbers of sensors of both trims inshALLAH.