The core difference: ExportMyMap's main flow is a Chrome, Edge, or Firefox extension you install and run from inside Google Maps. By their own site copy, that extension is desktop-only, because mobile Chrome doesn't support extensions. Their alternative for anyone who can't or won't install it isn't a pasted link either, it's a Google Takeout export: request your data from Google, download the Saved Places file, then upload it to their site. MapsLinkQuest skips both paths. Paste your list's share link in any browser, on any device including a phone in the field, and it converts right there. No install, no permissions to grant, no Takeout export.
On pricing: MapsLinkQuest's Explorer Pass is $19 a year and Lifetime is a one-time $49. ExportMyMap's Annual is $39 a year and its Lifetime is $64.90 one-time, both higher than the equivalent MapsLinkQuest tier. ExportMyMap's paid plans also keep a 200-place cap per Starred list, with only one cap-bypass allowed per year, even on Lifetime; MapsLinkQuest's paid tiers carry no cap at all.
Where ExportMyMap has an edge: It still supports more export formats overall, nine total including PDF, Print, XLSX, JSON, and a shareable link, versus MapsLinkQuest's four (GPX, KML, GeoJSON, CSV). MapsLinkQuest closed part of that gap by adding GeoJSON and CSV, so the two now match on the formats a GIS tool or spreadsheet would actually want, what's left on ExportMyMap's side is document/print export and its own web link, not GPS-navigation or GIS use cases. MapsLinkQuest stays deliberately narrower, built for getting a Google Maps list onto a GPS device, offline app, GIS tool, or spreadsheet, not for general-purpose format conversion.