I find the following on Miguel Diego Sans and Pedro Pons:

Pons, M., Pvt. 1st Co. 5th Regt. European Brig. (Spanish Regt.) La. Mil. Report dated New Orleans, La., April 2, 1862. Present. (No Pedro or P Pons) (http://files.usgwarchives.net/la/state/military/wbts/booths-index/p.txt)

Not on NPS site (www.itd.nps.gov/cwss/soldiers)

Pons, M, Pvt Co 1, 5th Regt. European Brig. (Spanish Regt.) La. Mil. (2 pp in compiled service records - NARA-M653)
Pons, Pedro Pvt Co 3, 5th Regt. European Brig. (Spanish Regt.) La. Mil. (2 pp in compiled service records - NARA-M653) (http://www.footnote.com/image/)

1860 US Census (NARA-M653) shows several Pons, but no P or Pedro Pons (2 M Pons) (http://www.footnote.com/image/)

Shows 2 files for Pedro Pons, born in Menorca, Spain, Married to Margaret Reeb Kepper, 9 Children born in New Orleans (http://worldconnect.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=oliverj819&id=I2203)

Sans, Diego, Pvt. Co. 5, 5th Regt. European Brig. (Spanish Regt.) La. Mil. On Roll dated New Orleans, La., April 2, 1862. (http://files.usgwarchives.net/la/state/military/wbts/booths-index/p.txt)

Not on NPS site (www.itd.nps.gov/cwss/soldiers)

Sans, Diego Pvt Co 5, 5th Regt. European Brig. (Spanish Regt.) La. Mil. (2 pp in compiled service records - NARA-M653) (http://www.footnote.com/image/)

1860 US Census (NARA-M653) shows one M. Sans, living in the 9th Ward of New Orleans (http://www.footnote.com/image/)

Shows one file for Miguel Diego Sans, born in Barcelona, Spain – Married to Margarita Pons (http://worldconnect.rootsweb.ancestry.com/cgi-bin/igm.cgi?surname=Sans&given=miguel+diego)

Hope this helps.

Don