I think you will be much happier with a plunge base type router for sign making. The depth adjustment on the router in your photo isn't easily adjusted for depth accuracy or repeatability. I prefer my DeWalt DWP611 with it's plunge base for tasks like this. It also came with a fixed adjustment base, but I prefer to use the plunge base for sign making and other uses that require repeatable depth adjustments. I added the optional vacuum attachment to it so that the chips are removed efficiently when my eyes and nose need to be close enough to see the router bit cutting area, like if I'm hand guiding the router while routing a sign. I also have a DeWalt laminate trimmer with 4 different bases, but no plunge base. I would not use it for sign making as it's just not the best design for this purpose, but it does what it was designed for very well.
Laminate trimmers, like the one in your photo, are designed to trim the overhang of thin materials like the hard surface materials used on counter tops. In this use, they do not require precise depth settings, and the bits used either have a bearing guide or smooth pin on the bottom end of them to act as a follower guide. The side of the bit does the actual cutting and not the bottom end, so precise depth adjustment isn't necessary.
The laminate trimmer in your photo looks to me like it might be one of the cheap Chinese Laminate Trimmers, but you didn't say who made it. A friend bought one similar to this one from a local Chinese Import Tool store, and it burned up within 5 minutes of use. He took it back and got another. This second one lasted until part way through his next job before the bearings went bad in it. He now owns a DeWalt laminate trimmer and has been using it on many jobs over the past several years without any problems at all, and he will likely not have problems with it for years to come, if ever.
Central North Carolina