SpartyME,
You never finished filling out your registration information, so we do no know where you are located. If you are in south or central Florida, I would offer you to shoot both grips.
In my training inventory I own all of them even, though the 350 is not in this photograph. I also own most of the other brands as well
While the 350 does have the softer rubber along the backstrap, I do not like the way it is open at the top of the backstrap. It looks like when they make he mold they had the Centennials in mind and forgot the Chief's Special had hammers on them, so rather than have a new mold made, the just opened the top of the backstrap up si the hammers could be cocked all the way back. When you see one in person, you will know what I mean
So in that respect I prefer the 405s.
However, the 350s can be purchased with the green laser. That is a huge advantage for daytime visibility.
Now back to the down side of the 350s. They have finger grooves. Anyone will small to medium hands will be just fine. If you have large hands or big paws like myself, the bumps for the finger grooves fall in mid finger. I find the 350 VERY uncomfortable to shoot.
To sum up, if the 350Gs fit you, the Green Laser is well worth the additional money for daytime carry. Otherwise the 405 is the way to go
For reference, the 105, 205, 305, 405 family of grips will not be offered with green lasers in the foreseeable future. The green laser requires 4 batteries for it additional current drain, so all of those molds would need to be re-made.