Samsung pro series, either sata, pcie, or nvme interface.
slightly less expensive are the other samsung evo series.
seriously, if they are used to a physical hard drive, then an SSD sata will be fine. Slightly better performance, particularly for boot or program startup and no concern if the laptop is knocked around. If the the laptop supports pcie or nvme interface, sure go that route for the boot drive. Data drive can still be a sata interface ( larger for same price and still plenty fast). Note- the larger the drive , typically the faster it can perform due to parallel access paths in the drive controller. Just look at testing results for drives of different sizes for the same brand and series.
The reality is that if the pc was designed for sata interface only, you won’t be able to use a pcie or nvme interface drive. If it does have either of those interfaces, then ot is probably already using one for the boot drive and replacing it will not make much real difference after the initial boot or program load.
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