How are they better made? In a review I heard that the dell mousepad doesn't work very well
"The touchpad is rather large, measuring 104 x 80 mm (~4 x 3 inches) and thus offering more than enough space when moving the cursor or issuing large-scale multi-touch commands.
The gliding properties as well as its reaction speed are great, leading to a comfortable working experience. The touchpad buttons function well, too, but they are not quite as "comfy" as dedicated buttons. Unfortunately, not only the number pad is missing, but also a TrackPoint (which is there on all larger Precision laptops), a painful cut for all fans of this input method."
Read the review that I linked to...
The M3800 is not better than the RMBP 15" in every way but here are some pros:
User removable: battery , SSD , RAM
Ability to have two different SSDs in the laptop
at the same time ( meaning you could have 2 TB of SSDs)
Higher resolution screen
Quadro GPU ( pro for CAD and other similar work)
Touch screen (like a basic tablet)
Business class warranty
Cons:
less battery life but can be comparable with the bigger battery and one SSD (mSATA) instead
Can't run Mac OS X natively (if you need Mac OS X , you are stuck with Apple for the most part)
Does not use PCIE SSD (hard to notice in basic tasks)