If you want to use your own account
The ChatGPT Plus listing delivers a gift link by email. Open the link with the account you want to use and follow the redemption instructions. The Claude Pro listing supplies a separate account, so it will have its own history and settings.
If you need a known access period
Claude Pro is listed for one month. The ChatGPT Plus catalog entry describes the activation method but leaves the access period unspecified. Check the product details before choosing based on duration.
What to compare first
For everyday writing, both tools can help with drafts and summaries. If your work is already in one account, confirm whether the listing lets you keep using that account. Then compare the displayed USD prices.