Wordpress: Use different loops - php

Question

I'm making an online magazine. Right now I'm trying to show the posts I'm posting. I've managed to do that, but what I want is that if a post is categorized in "Streetstyle", the loop will be completely different then if it's categorized in "Photography". I've mangaged to do this with one category, how can I do the same with other categories, and style it another way? I tried using the same code as <?php if (is_category( 'Streetstyle' ) || in_category( 'Streetstyle' ) ) { ?>, but then the theme just gets bugged and the posts shows up twice. Do you know of a better way to do this?
This is my code:
<?php query_posts('posts_per_page=9' . '&orderby=date');
while ( have_posts() ) : the_post(); ?>
<?php if (is_category( 'Streetstyle' ) || in_category( 'Streetstyle' ) ) { ?>
<div <?php post_class('pin streetstyle'); ?>>
<a href="<?php the_permalink(); ?>">
<div class="heading">
<h1>Fashion</h1>
</div>
<?php if ( has_post_thumbnail() ) {
the_post_thumbnail();
}
?>
<div class="heading">
<h1><?php the_title(); ?></h1>
</div>
</a>
</div>
<?php } else { ?>
<div <?php post_class('pin'); ?>>
<h1>
<?php the_title(); ?>
</h1>
<?php if ( has_post_thumbnail() ) {
the_post_thumbnail();
}
the_content('Les mer <br><br>'); ?>
</div>
<?php } ?>
<?php endwhile;
// Reset Query
wp_reset_query(); ?>

Answer 1

If you have a lot of categories I would recommend using switch, it will save you time and your code will look a lot cleaner.
http://php.net/manual/en/control-structures.switch.php

Answer 2

I've slimmed this down a bit, but this is probably more what you're after
<?php query_posts('posts_per_page=9' . '&orderby=date');
while(have_posts()) : the_post(); ?>
<?php if(is_category('Streetstyle') || in_category('Streetstyle')) : ?>
<div <?php post_class('pin streetstyle'); ?>>
<a href="<?php the_permalink(); ?>">
<div class="heading">
<h1><?php the_title(); ?></h1>
</div>
</a>
</div>
<?php if(has_post_thumbnail()) the_post_thumbnail(); ?>
<?php else : ?>
<div <?php post_class('pin'); ?>>
<h1><?php the_title(); ?></h1>
<?php
if(has_post_thumbnail()) the_post_thumbnail();
the_content('Les mer <br><br>');
?>
</div>
<?php endif; ?>
<?php endwhile; wp_reset_query(); ?>