Browser-based redirect vs. dynamic content

[ipancake]

Hey everyone,

We have a free browser extension for Chrome and a paid web product for all other browsers. Given the differences in product and pricing (free vs. paid) I'd like visitors to see a different landing page based on their browser. Visitors using Chrome should see a landing page with content about the free browser extension, while visitors from every other browser should see a landing page with content about the paid, premium web product. I'm trying to decide between these two options:

a) 302 redirect visitors from one static HTML landing page to another if their user agent suggests they're using Chrome

b) Use javascript to make parts of the landing page dynamic and show a different CTA and different copy for visits from Chrome

Does anyone have any experience with having to make this choice? What are some things I should take into consideration for optimal "crawlability" and page-load-speed? Thanks in advance!

[Stramark]

Google does not like what you are doing!

Google wants to have the same content on a page  (that rules out option a)

Option B sounds better. but make sure the copy is still on the page. Just vary the content you are presenting based on the user. (this is called the liquid internet)