They both play very clean and clear , but Becker is significantly faster and harder to immitate his licks ... Probably you mean Malmsteen's tone which is cleaner than Becker's , which is true although I prefere Becker's tone.
It's also noticeable that Becker's sweeping is much complicated than anybody else's .

And yeah , Malmsteen was the main inspiration for most late '80s shredders.
If you wanna listen to faster shredding , try Michael Angelo.