I too have an MGT and an LST and 2 savages and as txque said they are completly different animals. The MGT is a sweetheart to drive with the stock TT 21 that comes with it. Easy to tune and the added benefit of the dual starting system. As someone else said the radio system leaves much to be desired with the MGT. The shocks are easily blown out and the A-arms break easily. Now having said that I love my MGT for what it is, and has been slightly upgraded with a Hyper 8 port and RPM arms. The shock problem has not been addressed for the long term but in the short term I have added some shocks from an Ofna buggy to supplement the stock shocks. I also changed to the Associated red springs to give it more help. I also swapped the radio for a Futaba 3PDF.
My LST is the brute of the family. Fantastic Radio, Mach 26, Hi-Lo tranny and dual steering servos. Now my LST had the washer from the factory and I grenaded the engine before finding out about the washer so it now has the Sportwerks 26 in it. I have changed to the yellow springs for more rate and will order some RPM arms for it as well.
The savage is well...savage. A bear to work on but you seldom have to. The stock radio is ok and works flawlessly but it is very basic. The Savages I have came as 21's but Savage #1 has the Ofna Hyper 8 port in it. It has the RD Logics CVD's which are the same as Hot Bocdies CVD's. And that is all the hop-ups it has. #2 is in a state of flux waiting for me to decide how crazy to go with it.
The MGT is a great basher and I love driving it. It holds a line well and has a great way of soaking up the rough stuff. I like the way the chassis is laid out and it is easy to work on. The LST is also easy to work on and handles nicely. The LST suspension is great also. I bash my LST all the time and it does break but it is worht the trouble as it is the best driver. My Savages are like tanks. If I am going to try a really silly jump or something stupid, I reach for the savage as I know it has the best chance of survival.
To rate them I would say
Suspension;
Winner LST with MGT and the Savage tied for second.
Radio;
Winner Lst with the Savage in second and the MGT at the rear.
Stock engine;
As I do not have the Savage 4.6; and the new LST's shipping without the washer;
Winner Lst with Savage 4.6 a close second. MGT in the rear
Durability;
Savage, nuff said
I hope this helps you out as I am not used to writing a novel but I wanted you to hear the opinion of someone who has all 3 trucks.