SQL Express VS SQL localdb

Hello

I have a Utility that runs in Excel VBA to insert, update and view data from SQL Server.

We now have the need to use a modified version of the Program on Tablets for portability, My Question is should I use SQL Express or SQL localdb?

When the Tablets are being used they will be using the SQL 70% of the time.
Does Localdb use less of the PC's resources?
Would localdb increase the Battery life over Express?

(I am having issues connection to a test localdb and am wondering if it's worth troubleshooting it)
p-platerAsked:
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Jim P.Commented:
From a quick google search and came up with this:
LocalDB and SQL Express
LocalDB is not a replacement for SQL Server Express -- it is an addition to SQL Server Express lineup. While LocalDB is meant for developers, the regular SQL Server Express will continue to exist as a free SQL Server edition, fully compatible with and easily upgradeable to higher SQL Server editions.
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p-platerAuthor Commented:
I realise that, What I am asking is would the localdb be an advantage over Express on a Tablet.
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Jim P.Commented:
The power of tablets is a generation ahead of my current Win7 laptop and I'm running SQL Express easily on it.

If you aren't pressing the outer limits of that the app and DB II would go the SQL Express route. That way you are a step closer if you have to build a sync routine to a core DB on a server or anything similar.
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p-platerAuthor Commented:
Tablet has Intel Atom CPU Z2760 1.80GHz
2 GB RAM
Windows 8

And yes - I will want to add a sync to our main SQL server database
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dbaSQLCommented:
I really don't think the localdb would be any real significant advantage over SQL Express.
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Vadim RappCommented:
If I understand correctly, your sqlexpress or localdb is local on the computer and is being used by one user. If this is wrong, you can skip the rest.

Is this is right, then consider sql server compact edition. With that, there's no separate product to install, and no separate running process. It's just a database file, but it's still SQL database. It has limitations compared to "full" sql, but for simple tasks it's perfect.
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p-platerAuthor Commented:
I looked at SQL Compact but you can't access the data from Excel VBA.
I also need to run stored Procedures which you can't in Compact.
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