According to nomanssky.gamepedia.com (starship) the Explorer ship has better stealth capabilities:
Explorer starships have better engines and hyperdrives than other
ships, allowing for faster and further travel. Additionally, ships in
this class have better stealth capabilities, improving their pilots'
ability to remain undetected during exploration.
How does stealth work in NMS? I haven't seen any sort of cloaking or other means. Perhaps it's passive to prevent pirates from seeing you?
As of right now, there are no functional differences in "ship types," despite what was advertised. There is no known way to prevent pirates from attacking, though carrying less valuable inventory may lower your encounter rate, though this also isn't exactly confirmed.
it doesn’t look like the actual multi-tool or starship you end up picking matters outside of the slot space it offers.