4K Blu-ray

Japan Toho 4K Blu-ray is an upscale of the original 2K DI but has no English subtitles, all past releases are flawed scans from filmout sources.

Criterion 4K Blu-ray is best, but has surrounds 3 dB too loud

Universal 4K Blu-ray - caps. Good PQ upgrade but only Atmos audio.

Second Sight 4K Blu-ray has better encoding than Magnolia Pictures Comparisons

Solid upgrade and the increase in resolution works well with the 16mm source in making it appear a bit more film-like than the Blu-ray, which is obviously very good as well

The 2014 Fox Blu-ray has the Theatrical Cut, The Pilgrim's Guide for the Theatrical, as well as a few documentaries on the bonus disc that are not on the 2025 bonus disc

WB 4K Blu-ray has Excessive DNR

UK StudioCanal 4K Blu-ray or FR Pathé 4K Blu-ray share the same disc (caps)

The StudioCanal UHD has a much better encode than the Lionsgate UHD with the same grade. The Vuelta UHD has a decent encode but it is in an incorrect color space and has German overlays.

UK disc includes only 5.1.

The 7.1 mix included on the Lionsgate UHD appears to be identical to the 2006 USA BD's LPCM 7.1 track and to be a straight transfer of the theatrical Dolby Digital Surround EX mix (originally matrixed 6.1, with the rear surrounds in the discrete 7.1 presentation being dual mono). The old GER BD has a 6.1 mix but it is a poor remix and the GER UHD has an Auro-3D remix of the 7.1 mix (mostly adjusted surround levels). All other discs offer a 5.1 mix, including the Studio Canal UHD

Japan 4K Blu-ray and Blu-ray have an exclusive end credit song on the Complete cut that is not present on international releases by Sony.

All Japanese releases of the Complete cut have English dub options, but no English subtitles for the original Japanese audio or on-screen text. Original cut only has Japanese audio without subtitles on the Japanese DVD.

All international releases by Sony only have dubtitles for the Japanese audio, not a proper translation of the Japanese script.

Old Paramount Blu-ray better than new 4K Blu-ray: smeary grain/detail, poor contrast

4K Blu-ray and New Blu-ray has lossless TrueHD, Old Blu-ray just has lossy Dolby Digital

From Fus1on:
Because this is a Judd Apatow comedy from the mid-2000s, it's not quite a stunner in 4K, but it's a MASSIVE improvement from that god-awful 2008 Blu-ray. Very nice grain management, and none of that awful edge enhancement from the old Blu-ray.

US Magnolia Pictures 4K Blu-ray uses the same source but with worse encoding

Warner Bros 4K Blu-ray caps. Original 1.85 framing restored, much better colors, image detail and a film stock-like tone curve was restored.

Warner Bros HD-DVD has the original 6.1 mix in a better format than the Blu-ray (Dolby Digital Plus instead of standard Dolby Digital), but is still lossy and a disc prone to disc rot. The Blu-ray is a good alternative.