asunakirito Agree with Lex. The speakers that you mentioned are indeed very good speakers. But they are having different structure and size, so can't really compare.

There are 4 points that I need to point out here. Firstly, If around the same price range, bigger speaker like 4 or 5 inches will easily produce more bass and all rounded in performance.
Secondly, full range speaker is not technically strong such as details and separations as compare to 2-3 way speakers. But compare to low range multi way speaker below RM1K, multi way speaker might sound separated from different drivers. Full range might sound more harmony and present the frequency range as a whole image.
Thirdly, X3 a passive speaker with very low sensitivity (82db). X2 is a basic amp for the speaker to play but not the best combination. I tried using Musical Paradise MP301 MK3 to drive it, the performance is much better. But of course, it's back to whether you are willing to spend and invest on it.

Lastly, the X3 that you auditioned, is actually considered almost brand new set. Burn in less than 10 hours.
All these would affect the sound quality.

X3 is indeed with lesser bass since it's 3 inches. It's suitable for small room and plays well for chamber music, pop, acoustic and so on. Not so good on rock and big production music.