Is this a good choice if I'm looking for a Chardonnay without presuming its style?

Yes, the grape variety listed is Chardonnay. However, there are no tasting notes to describe it as particularly vibrant, full-bodied or oaky: the grape variety alone is not enough to choose between these profiles.

Which should I choose: this Marsannay Blanc or the Bourgogne Chardonnay "Scritch"?

If your goal is to discover a Chardonnay from the Marsannay appellation, choose this Marsannay Blanc. The Bourgogne Chardonnay "Scritch" comes from a different appellation; however, the information provided does not make it possible to compare them in terms of richness, freshness or ageing.

What would be the point of tasting it alongside the 2025 Bourgogne Aligoté "Scritch"?

This pairing would allow you to compare two grape varieties: Chardonnay in the Marsannay and Aligoté in the "Scritch." The vintages are also different, 2023 and 2025, so you should not attribute every difference you perceive to the grape variety alone.

Could it have a place in a tasting devoted to white wines from Burgundy?

Yes, it would offer an example of a Chardonnay from the Côte de Nuits, under the Marsannay appellation. For a clear geographical comparison, choose other Chardonnays from Burgundy whose origins are clearly identified.

Is the name Marsannay enough to find this same bottle again after a tasting?

No: also note the white wine, the name Arlaud Cyprien and the 2023 vintage. These details will help you find this specific wine rather than another wine bearing the same appellation.