Alex Smith coming out of Urban Meyer's Utah program was a pretty good QB. I personally saw most of his games and he was an incredibly accurate QB and was a legit pick in that draft as the #1 seed. Very smart and could really analyze a defense. He's got a raw deal in Frisco for his entire career. I fully expect him to end up in either Arizona or with the Jets this next season.
However, the major point with Smith is that he never had an arm that would drive the ball downfield to all points. (Which is the prime reason that Harbaugh went with Kaepernick over Smith, though you can really make an argument that he ****ed the team chemistry up with the switch at this point in the season.)
I can see someone attempting to make the comparison to Geno though. Smith's combine numbers:
6041 - height
217 lbs. - weight
4.71 - 40 yard dash
9'05" - broad jump
3.97 - 20 shuttle
Pretty good numbers.
And considering that Smith was leading the NFL in completion % and passer rating, two things that Geno excels at, the comparison is at least a better one than the ignorant bullshit Jamarcus Russel or Byron Leftwich ones.
But the one thing Geno has is the ability to drive the ball deep - with confidence. There is a little gunslinger in Geno that is going to make defensive coordinators worried that a very good game manager like Smith does not have. Take Smith's accuracy and put it together with a Rogers type mentality and that's Geno.