I recommend you take her for a low vision evaluation. They will have equipment for her to try, and they can provide some training on the devices.

The two devices you linked are vastly different in performance, you really should go visit a low vision center together with your grandmother, and see what works for her.

Depending on where you are, I assume the US, you can google for a center near you and/or a distributor of these devices that will have a large selection. They will happily visit your grandmother and show the options they can offer as well. They both should be able to inform you about possible funding options from local or national programs depending on your grandmothers situation and past.

What strength magnification does she need? Has she been to a low vision specialist yet?

Do you know if she has wet or dry macular degeneration? The wet version is usually more advanced, so there is (likely) greater loss of vision.

For many people, they use something like a CCTV (like the Merlin you posted, or a Clearview). Before you purchase that, find out if your state or province has a funding program (where I am, the province would cover 75% of the cost). A low vision specialist can help with that.

Something else to try is something called an OTT bulb, sometimes marketed as a full spectrum bulb. It is designed to replicate natural sunlight, so it puts out light across a wider range of the spectrum, and it can help some people with macular degeneration. It doesn't work for everyone, though.

My mom has the same thing esight but they can get expensive. There is also a YouTuber named the blind life that talks about all kind of options.

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