I have several Lamy Studios and two Aurora Ipsilons. They're both quite good pens, but also quite different. Although roughly similar in size, the Studio is made of metal, and much heavier than the Ipsilon. Of course, that's either a good thing or a bad thing, depending on your preference. The Studio has a slick, metal grip section, whereas the Ipsilon has a plastic grip section with a "lip," between the grip section and the nib. The Studio grip may not be for you if you have sweaty fingers or live in a humid climate. If you write with a very heavy hand (i.e. you like to press the pen very hard against the paper), the Studio is probably the better choice. Conversely, the Ipsilon is probably better suited to writing with a light hand. I like the curving body of the Ipsilon better than the sleek looking body of the Studio, but of course that's purely a matter for personal preference. I have a Studio in the limited edition (and very good looking) color known as Royal Red, and keep it filled with red ink for when I want to mark up documents. I also have an Aurora Ipsilon in Green which is one of my newer pens. I have it filled with Diamine Green-Black and this pen, with this ink, is currently one of my favorite pen-ink combinations. I keep intending to make a post about it, but haven't got round to it.