Hi
The only differences between car lead acid battery and sealed lead acid battery as the name implies you don t need to add water periodically ( maintenence free) and as you will operate it in home i suggest sealed battery as you will not need ventilation. As for the current capability I don t agree with other friends about it , both batteries has a high current capability, that is why both are used on cars tha need a high starting current ( hundreds of amps in big cars you reach 400 a easily)
Regards