  A sample of narrow-line (NLS1) and broad-line Seyfert 1 (BLS1) galaxies
observed with Suzaku is presented. The final sample consists of 22 NLS1s and 47
BLS1s, for a total of 69 AGN that are all at low redshift (z<0.5) and exhibit
low host galaxy column densities (<10^22 cm^-2). The average spectrum for each
object is fit with a toy model to characterise important parameters, including
the photon index, soft excess, Compton hump (or hard excess), narrow iron line
strength, luminosity and X-ray Eddington ratio (L_x/L_Edd). We confirm previous
findings that NLS1s have steeper power laws and higher X-ray Eddington ratios,
but also find that NLS1 galaxies have stronger soft and hard excesses than
their BLS1 counterparts. Studying the correlations between parameters shows
that the soft and hard excesses are correlated for NLS1 galaxies, while no such
correlation is observed for BLS1s. Performing a principal component analysis
(PCA) on the measured X-ray parameters shows that while the X-ray Eddington
ratio is the main source of variations within our sample (PC1), variations in
the soft and hard excesses form the second principal component (PC2) and it is
dominated by the NLS1s. The correlation between the soft and hard excess in
NLS1 galaxies may suggest a common origin for the two components, such as a
blurred reflection model. The presented Suzaku sample of Seyfert 1 galaxies is
a useful tool for analysis of the X-ray properties of AGN, and for the study of
the soft and hard excesses observed in AGN.
