Well I own a YJM Sig and an RG3120 Prestige (oh yeah and a Tokai Love Rock), anway.
First off - expect totally different worlds in terms of playability, sounds, and the way you play. *The YJM Strat will make every mistake you make stand out, humbucker equipped guitars to my ears tend to smooth over some mistakes in quick picking but the YJM will catch out any technique flaws.
Playability: The YJM is the easiest Strat you will ever play. *The scalloped fretbaord takes little adjustment (for my hands), it makes vibrato and bending a breeze. *The fact that the YJM has a scalloped fingerboard and Dunlop 6000 ENORMO-FRETS make for a very different feel to that of your Jem. *If you like the feel of wood under your fingertips prepare yourself for a totally new experience. *This is like walking on a tightrope, but after youhave adjusted you will love it. *Your vibrato will also improve on the Jem as a result of using the YJM. *The neck is one of the thicker Strat necks you will come across, but it is a comfortable D shape, its supposedly shaped on a 1968 neck shape but to me its more reminiscent of a mid 70's, slighty clubbier. *The tremolo is superb once you have it set up right and the body fits the err body like a glove.
Sound: *The YJM Strat is equipped as you probably know with a DiMarzio HS-3 in the bridge, and DiMarzio YJM's in the mid and neck positions, these are accessible via a 3 way selector. *What you may not expect is that these are VERY VERY LOW OUTPUT pickups, kicking out 93mV, almost 4 times less than the Evo's, what this means is that a very pure clean signal is sent to the amp. *It will not have the sustain or the inherent warmth of the Evo's and as a result make you work harder for getting natural sustain as you are not getting it from the pickup. *The HS-3 is based on a vintage PAF humbucker, it has the same tonality but obviously does not sound the same due to its lower output and magnetic field size (area of string it picks up) - this is from James Byrd (DiMarzio endorsee who used the HS-3 for years before changing to the VV54B). *The YJM sounds like *sh*t
in the bridge position but gets a nice flutey type quality in the neck position, its the same as the HS-3 but it has a vintage magnet stagger, quite why it sounds so different in the bridge position is beyond me but there you go. *The sound out of the guitar as a whole is very 'woody', their is excellent note definition when playing chords and high speed licks sound superb. *The Yngwie tone is only present in the guitar when you couple it with the right equipment, its a guitar that sounds better when the gain is NOT on 10. *Also you will probably need an overdrive pedal with this guitar to get the distorted tone you are after - it works very well with a Boss SD-1 Super Overdrive, a Dod250 Overdrive/Preamp or an Ibanez TS-9 (I use the SD-1 and Dod250), it does NOT perform so well with metal type dist pedals. *You can get blues tones out of it, and superb clean tones too.
Reliability: Not bad, never had a problem as such, the screws have rusted out on me on the scratchplate and pickup selector but then every Fender I have owned has done this. *The tremolo and other metal parts have not though. *I had to take it in to my tech a couple of weeks back as my neck shifted, this was solved with a truss rod tweak and fretdress to make up for the uneven bow in it, I am assured that ANY guitar can do this and its down to the nature of the wood more than anything else. *The scallop fingerboard will NOT weaken the neck as its pretty wide to begin with.
Overall the guitar is superb - easily the best Strat I have ever played/owned and I would not part with it for the world.
Hope this help? Any more q's email me or post here.
For more info check out my Yngwie website at: http://www.yngwiemalmsteen.net
(Edited by strat110 at 5:45 pm on Dec. 30, 2001)