I am currently looking at this VCSEL. According to the datasheet, it has a narrow spectral linewidth and emits a Gaussian beam, which are both properties that I find interesting. But I'm also interested in the wavefront quality. However, despite my research, I cannot find any sources that discuss the wavefront quality of VCSELs. What is the wavefront quality of VCSELs? How does the wavefront quality of VCSELs compare to Fabry-Perot laser diodes and DPSS lasers?
Companies that sell optical components often help customers choose the best component. This includes understanding them, how they work, tradeoffs, and so on. Your link has a Complete Product Details button, which has a tech support link. Use it.
Also a good general source for information on optical components is the RP Photonics Encyclopedia and Buyer's Guide. For example, see Vertical Cavity Surface-emitting Lasers and Fabry–Perot Laser Diodes.