I would say the GAASS would be your best bet if you want a heavy glaucoma component.
From a job perspective, I'd like to give you a couple of things to consider. The general anterior segment fellowships like Vold and Vance Thompson are great training and real-world, private practice experience. However, when looking for practices, these types of fellowships probably don't serve you well in large metros where there are a lot of sub-specialists unless you open your own practice or get into a smaller boutique style practice. In rural areas they are great but the refractive component will take time to build(take note of where these fellowships are located). If you think you would like a multi-specialty practice, these fellowships can run the risk of making other docs things you're trying to eat into their respective sub-specialty in the group.
I'd say it's probably easier to do a glaucoma fellowship with strong cataract numbers than it is to get an anterior segment fellowship with strong tubes/trab experience. The refractive cataract training can continue on the job with your practice after a glaucoma fellowship since most glaucoma jobs have a strong comprehensive component now.
Not the law on these things but they can affect your job search.