Right next to the clip, you can find a small laser-engraved logo. Lamy's minimal branding (apart from that on the Safari and Al-Star) is something I always enjoy seeing. It's very unobtrusive, and I actually like the way it looks, in contrast to some pens where I think the branding disturbs the design.
|L to R: TWSBI Eco, Pilot Vanishing Point, Lamy Studio, Lamy safari, Lamy 2000|
Depending on the model, you can either get a rubberised grip (brushed steel version), a glossy chrome grip, or a matte palladium grip on the palladium version. In most cases you'll end up with a glossy chrome grip. The other two offer a decent grip and are really comfortable (long, nicely shaped, very small step from section to barrel), but the chrome version can be a dealbreaker. I honestly don't understand why they would want to make so many different sections...
|L to R: rubberised section, glossy chrome section, palladium section|
With this in mind, I'd personally recommend getting the cheapest version, the brushed steel. The rubberised section is comfortable and grippy, and it's actually the most affordable option. It's a bit unfortunate that they don't offer the rubberised grips on all the colors and finishes, so you'll have to take it into account when you're making a choice.
On to the nib. Here you'll also find some differences, depending on which finish and color you choose. The brushed steel, matte black and imperial blue finishes all come with steel nibs, but the palladium and Platinium versions come standard with a 14k gold nib. Again, these configurations are as-is, so you can't get a blue version with a gold nib, or a palladium version with a steel one, but you can buy nibs separately and swap them out yourself.
The nibs, both steel and gold, are excellent writers. I'm a fan of Lamy nibs -let's make that clear-, they write consistent and smooth, and they are usually well-tuned. The gold nibs have a slight edge in my opinion, because they have a little softness to them, which gives some bounce when you write (don't expect much line variation though!).
As I said in the beginning of this review, the Lamy Studio is a pen with a lot of potential. Prices start at 47.5 EUR (71.2 USD) for the brushed steel version, and go up from there. For the Palladium version with gold nib, you'll pay around 170 EUR/ 160 USD. The Platinium version, which is quite hard to find, sits somewhere in the 200+ range. In such a wide price range, you'll easily find something that suits you most.