well, i only do the 1U course for SOR (1U is only offered here at my school).
but yes, you would have to know 3 from all the above cross religion studies, in terms of christianity and judaism. how each one is similar/different over the 3 different areas such as ritual, ethics, and sacred writings/stories.
fortunately for me,
i have:
foundation study 1 (same for 1 and 2U SOR)
foundation study 2 (same for 1 and 2U SOR)
ISP (same for 1 and 2U SOR)
the only difference is the cross religion studies,
1U course studies 1 cross religion study,
(we're doing religious ritual)
but for you, the 2U candidate,
you'll be doing:
religion and ethics
sacred writings and stories
and religious rituals.
or any 3 from the 6 cross religious studies
(you dont do ways of holiness, teachers and interpreters and religion and women).
in summary:
1U: foundation studies 1+2, ISP and 1 cross religion study (with 2 religious traditions to 'cross reference', comparing and contrasting).
2U (you): foundation studies 1+2, ISP, and 3 cross religion studies, using 2 religious traditions (judaism and christianity) to compare/contrast between each religious study.
e.g. how is judaism and its wedding different to christianity's
etc.